To verify a trade company in Nanning, a process similar to those followed in official business verification channels would be applied. Here’s a step-by-step guide:

1. **Check Company Registry**: The first step is always to check the company with the local government registries. In Nanning, this could be the City Bureau of Industry and Information.

2. **Verify Identification**: A trade company should have an official business license or registration number, which can be cross-checked.

3. **Inspect Online Presence**: Check the company’s website, social media platforms, and other online directories to verify authenticity.

4. **Contact the Company Directly**: If possible, try to contact the company directly through their provided phone numbers or email addresses. A legitimate trade company will respond promptly.

Remember that verifying a trade company in Nanning may take some time and effort due to the need for official checks.